#ifndef YASLI_TRAITS_H_
#define YASLI_TRAITS_H_

// $Id: yasli_traits.h 754 2006-10-17 19:59:11Z syntheticpp $




namespace yasli_nstd
{
/*
template <bool b, class T = void>
struct enable_if {};

template <class T>
struct enable_if<true, T> { typedef T type; };
*/

//!! TYPE SELECTORS
//Used in place of enable_if:
//not so neat or so versitile but they do compile
template<bool condition, class if_true, class if_false>
struct type_selector
{
	typedef if_true result;
};

template<class if_true, class if_false>
struct type_selector<false, if_true, if_false>
{
	typedef if_false result;
};

// Types for differentiating compile-time choices
typedef char (&yes_t)[1];
typedef char (&no_t)[2];

// Credit goes to Boost;
// also found in the C++ Templates book by Vandevoorde and Josuttis

//!! Wouldn't compile with these inside is_class
template <class U>
yes_t class_test(int U:: *);
template <class U>
no_t class_test(...);

template <class T> struct is_class
{
	enum { value = (sizeof(class_test<T>(0)) == sizeof(yes_t)) };
};

template <typename T> struct is_pointer
{
	enum { value = false };
};

template <typename T> struct is_pointer<T *>
{
	enum { value = true };
};

template <typename T> struct is_memcopyable
{
	enum { value = int(!is_class<T>::value) };
};


template <typename T> struct is_memmoveable
{
	enum { value = int(!is_class<T>::value) };
};


// For moving
enum move_t { move };

} // namespace yasli_nstd

#endif // YASLI_TRAITS_H_
